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@with tutes datent @Hire WALTER C. BENN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO HIM- SELF, L. L. BAKER, AND R. HAMILTON, AOF SAME PLACE.

Letters .Patent No. 82,277, dated September 22, 1868.

IMPROVEMENT IN SPARK-ARRESTERS FOR STEAM-GENERATORS.

dige rlgehule :einen tu in tigen Entert patent mit mating part uf the same.

TO ALL WHOM IT MAY CONCERN: i

Be it known that I, WALTER C. BENN, of the city and county of San Francisco, State of California, have invented an Improved Spark-Arrestcr for Engine and other Chimneys; and I do hereby declare the following description and accompanying drawings are suicient to enable any person skilled in thelart or science to which it most nearly appertains to make and use my said invention or improvements without further invention or experiment. y

The object of my invention is to provide an improved spark-arrester to be attached to the smoke-stacks of engines and to other chimneys, forthe purpose of extinguishing the sparks or burning cinders before they pass from its mouth, and which are liable, when falling upon any combustible material, to create loss by re. It also consists in an improved device for regulating the draught by means `of the spark-arrester.

This object I accomplish by the use of a water-tank situated in the chimney, and by constructing the top of the chimney or smoke-stack so as to form a curve on the inside, against which the sparks, when forced up by the action of the exhaust-steam, strike and fall into a cone-shaped water-tank orv vessel, which is placed inside of the chimney, directly under the opening in the top, where they are extinguished. This cone-shaped tank is kept lled with water by means of pipes connected with the water-tank, which pass through the stack, and enter the cone near its top. From the apex of the cone, another pipe passes, extending outside the stack, through whichthe water in the tank and accumulated cinders may be disposed' of. Besides extinguishing the sparks, the water partially cools and condenses the steam and gases before they escape from the chimney.

In case it is necessary to have additional security, a trough may be constructed around the outside of the chimney, at its top, which is also filled with water, while a bonnet or cover is placed over the whole, so as to be raised or lowered, which serves to arrest any sparks that may have escaped with the smoke, and cause them to fall into the water in the trough. Either the cone or bonnet may be raised and lowered so as to regulate the draught by opening and closing the top of the chimney.

To more fully illustrate and explain my invention, reference is had to the accompanying drawings, zorming a part of this specification, of which- Figure l is a sectional elevation.

Figure 2 is a view'cf one of the slides.

A represents the upper portion of a smoke-stack, hav-ing its top curved inward, as shown at a, leaving the opening or exit-ue B for the smoke to pass out to the open air. A cone-shaped vessel, C, is placed inside of the smoke-stack, having its mouth directly under the opening B, and which is kept constantly filled with water through the pipes Za b. These pipes are attached to the vessel C, near its top, and extend through the smokestack, and have their'opposite ends connecting with the water-tank, which supplies the vessel C by means of.

cocks on the outside of the stack. These pipes, where they pass through the smoke-stack, are set in slides c c, and by moving these slides up and down, the vessel C is raised and lowered, thus creating a greater or less draught, as desired.

The smo-ke and sparks being forced by the exhaust steam from the engine up the chimney A,'the smoke passes out at the exit-due B, while the sparks and burning cinders striking the. curve a, fall down into the vessel C, where they are extinguished by the water. A pipe, d, passes from the apex of the vessel C, through a slide, c, in the body of the smoke-stack, through which the water and accumulated cinders in the vessel C may be drawn oi.

Should this not be found suicient to arrest all of the sparks, I place an additional security on the outside oi'Y 'the smoke-stack, consisting of a cover, D, which is arranged so as to be movable up or down, by means of small standards e c c, which pass down the side of the smoke-stack, through holes between its wall and an annular trough, E, which is also filled with water. Thus the escaping sparks are caught by the cap, D, and caused to fall into tne water in the trough E, from whence they may be drawn o' through 'the pipe d.

By this arrangement, I have a sparkarrester which may be placed upon any smoke-stack, and one which is easily operated and readily cleansed, causing 'a perfect extinguishment of all sparks from the Bre, thus pre? venting manyvlosses arising from the sparks settling upon and communicating re to combustible material; also, by. their arrangement, the cone-shaped vessel C and the cap D serve as dempers, and may be set to allow any amount of draught desired, while the steam and the other escaping gases are much cooled and condensed by contact with the wat'er, and the soot is almost wholly deposited before leaving-the chimney.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

4 1. The stack. or chimney A with the curve a, as shown, and the water-vessel C, together with the supply and discharge-pipes b b and d, the whole constructed-and arranged substantially as herein described.

2. The secondary bonnet D and th'eannular water-trough E, as arranged, for more completely extinguishing the sparks, substantially as described. Y Y

3. The conical vessel C and bonnet D, movable in the slides c c e, for regulating the draught, the whole constructed and arranged substantially as herein described.

In witness whereof, I have hereunto set my hand and seal.

WALTER C. BENN. [las] Witnesses:

J. L. BooNE, Guo. H. STRONG. 

